#3743AC#3743AC

#3743AC is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.9% C 0.167 H 272.5°. Best body text is #FFFFFF at 8.20:1 contrast (WCAG AA passes).

Color values

HEX	#3743AC
RGB	rgb(55, 67, 172)
HSL	hsl(234, 52%, 45%)
HSV	hsv(234, 68%, 67%)
CMYK	cmyk(68%, 61%, 0%, 32.5%)
CIE-LAB	lab(33.57, 30.19, -57.71)
CIE-LCH	lch(33.57, 65.13, 297.61°)
OKLab	oklab(43.93% 0.0073 -0.1664)
OKLCH	oklch(43.93% 0.167 272.5)
XYZ	xyz(11.0266, 7.8041, 39.9470)
Luminance	0.0780 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.26

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3743AC #ACA037

analogous

#377EAC #3743AC #6637AC

triadic

#3743AC #AC3743 #43AC37

tetradic

#3743AC #AC377E #ACA037 #37AC66

square

#3743AC #AC377E #ACA037 #37AC66

split-complementary

#3743AC #AC6637 #7EAC37

monochromatic

#191F4F #28317E #3743AC #5763C9 #858ED8

Accessibility & contrast

On white

8.20

#3743AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3743AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743AC

8.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743AC	#FFFFFF	#000000	##FFFFFF
##3743AC	1.00	8.20	2.56	8.20
#FFFFFF	8.20	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054AF

Deuteranopia (green-blind)

#004AAA

Tritanopia (blue-blind)

#005D71

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3743ac;
/* rgb */ color: rgb(55, 67, 172);
/* oklch */ color: oklch(43.9% 0.167 272.5);

Tailwind

colors: {
  custom: {
    50: '#7c77c6',
    500: '#3743ac',
    950: '#000000',
  },
}

SCSS

$custom: #3743ac;
$custom-light: #7c77c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3743ac",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 172
  },
  "hsl": {
    "h": 233.846,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.4393,
    "c": 0.16652,
    "h": 272.5
  },
  "luminance": 0.07805
}

Semantic roles & 50–950 ramp

primary

#3743AC

secondary

#C2BB7D

accent

#CC4DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3743AC

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →